6649992 has 64 divisors (see below), whose sum is σ = 19569600. Its totient is φ = 2085120.

The previous prime is 6649919. The next prime is 6649999. The reversal of 6649992 is 2999466.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6649999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2767 + ... + 4577.

It is an arithmetic number, because the mean of its divisors is an integer number (305775).

Almost surely, 2^6649992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6649992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9784800).

6649992 is an abundant number, since it is smaller than the sum of its proper divisors (12919608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6649992 is a wasteful number, since it uses less digits than its factorization.

6649992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843 (or 1833 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 6649992 is about 2578.7578405116. The cubic root of 6649992 is about 188.0501601481.

The spelling of 6649992 in words is "six million, six hundred forty-nine thousand, nine hundred ninety-two".